Fluid-pump



G. OLSON.

FLUID P UMP.

APBLICATION FILED JAN. @1917. 1,338,839 Patented May 4, 1920.

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FLUID PUMF. APPLICATION FILED 1AN..4. 1917.

1,338,839. Patented Mm, 1920.

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G. OLSON.

FLUID PUMP.

APPLICATION FILED m4. 4. 1912.

1,338,839. Patented. May 4,1920.

3 SHEETS-SHEET 3.

\\\\\ sv W ||L| n|n casing ring or shell.

UNITED sTAfr s PATENT OFFICE.

eus'mr arson, or CHICAGO, rumors, ASSIGNOR or ONE-HALF monwnn, or cnrcaeo, ILLINOIS.

TO WILLARD M" FLUID-PUMP.

Specification of Letters Patent.

. Patented May 4, 1920.

Applicationflled January 4, 1917. Serial No, 140,543.

and State of Illinois, have-invented certain new and useful Improvements in Fluid- Pumps, of which the following is a specl fication.

This invention relates to fluid pumps of the type wherein the rotor is eccentrically mounted in, the casing and carries vanes.

adapted to subdivide and traverse a chamber formed between the casing and the periphery" of the,rotor, for the purpose of compressing and ex ellin the fluid contents of said chamber. 1 deuce of this type is more fully described and claimed in my cogending application, Serial No. 119,462, led September 11, 1916, and of which the subject matter of/ this application constitutes in many respects an improvement The main-objects of this invention are to rangement of the casing afl'ording improved means for cooling the pump; to provide an improved mounting of the rotor inthe casing; and to provide improved means for controlling the vanes and holding them into contact with the wall of the compression chamber during the travel therethrough.

An illustratlve embodiment of this invention, is shown in the accompanying'draw- 's, in WhlCh-' I igure 1 is an end elevation, partly sectional, of the improved fluid pump.

Fig. 2 is a side elevation, partly sectional,

of the same.

Fig. v3 is a sectional detail of the inner casing .ring or shell.

Fig. fisan end view of the same. Fig. 5"is a sectional detail of the outer Fig. 6 is an end view of the same. I Fig. 7 is an end view of the rotor. Fig. 8 is a fragmentary plan of the same. Fig. 9 is an end view of'one of the disk members which is .a part of the means for causing the reciprocation of the vanes.

Fig. 10.is a sectional detail'of the same.

Fig. 11 is an end view oficne of the casing end plates.

Fig. 12 is a sectional detail of the same,

Fig. 13 is a perspective view of one of the vanes.

Fig. 14 is a detail view, partly sectional,

illustrating the mounting of the rotor shaft on the eccentric bearings which in turn suport the disks, one of which is shown in *i 9.

Tn the construction shown in the. draw-- ings, the casing is made up of outer and inner rings or shells 1 and 2 arranged one within the other and having the ends thereof closed by. means of end plates 3 and 4.

The outer ring or shell is provided with base supports 5 upon which the device is adapted to rest, and the bore thereof issub stantially perfectly cylindrical and provides an air-tightfit with the outer pe-,

riphery of the inner shell or ring .2,when the two are assembled. The inner ring 2 has an annular recess formed in the outer periphery thereof, be-.

tween the ends of the ring, which extends nearly all the way around so as to provide a cooling chamber 6 within said casing. The

ovaLshaped bore of the inner ring 2 is a I composite formation of two eccentrically arranged bores providing an approximatelysemi-cylindrical wall 7 formed with its center 'at 8 and an approximately semicylindrical wall 9 formed with its center at 10. The radius ofthe,wall 9 is somewhat larger than the radius of the wall 7, so that the peripheral length of... the former is greater than thatof the latter, as will be more readily observed from F igs. 1 and 4.

The end plates 3 and 4' are a ap means of screws 11 so as to'form closures as bearing supports for the rotating parts of the pump.

The rotor 12 is j ournaled in the ring 2 on an axis coincident with the center 8 so that the periphery 'of said rotor fits with the corresponding annular wall 7 and provides and discharged at 'theopposite end, as will more full hereinafter appear. The rotor 12 is rigi ly mounted on ashaft 15 and has ted to be I attached to the *inner ring or shell 2 by.

for the bore of the inner ring and also serve formed therein a plurality of radially disposed slots 16 in which the vanes 14 are I reciprocatingly mounted.

The reciprocation of the vanes 14 is effected by means of disk members 17 coacting with lugs 18 formed on the ends of the vanes 14 and carrying bearing memhers 19 slidably mounted in annular grooves 20 formed in the inner faces of said disk members. The disk members 17 are rotatably mounted in recesses 21 formedin the inner faces of theend plates 3 and'4 and at the same time journale'd on bearings 22. The bearings-22 are in the form of stud shafts rigidly secured in said end plates on an axis coincident with the center 10 so that said stud shafts are obviously cccentrically arranged with respect to the shaft 15 which they rotatably support. The annular grooves 20 formed in the inner faces of the disk members 17 are of course concentric with the axis of rotation thereof, so that as the rotor 12 revolves and the distance between the axis thereof and the grooves 20 increases and decreases, the. vanes 14 are caused to shift outwardly and inwardly respectively for the purpose of keeping the ends thereof in contact with the annular wall 9 as said vanes are being moved through the compression chamber '13. Being thus supported at both ends, the reciprocation of the vanes 14 is very positive and is effected with very little friction.

The admission of fluid to and thedischarge thereof from the compression chamber 13 are through the inlet ports 23 and 24 respectively. These ports are in the nature of threaded openings so formed in opposite sides of the rings 1 and 2 that when the rings are assembled, the openings come into alinement and permit pipes or other fittings 25 to be screwed entirely through the openings in the ring 1 and into the alined openings in the ring 2 so that said fittings bridge the joint between the rings,

as is indicated in Fig. 1. This readily insures a fluicttight connection with the compression chamber 13. Recesses 26 and 27 are formedin the inner periphery of the ring-2 adjacent to the inlet and outlet ports 1 so as to increase the communication between connect with opposite ends of the cooling.

. be either airor water,

the ends of the compression chamber 13 and the respective inlet and outlet ports 23 and 24.

Inlet and, outlet 'ports 28 and 29 are formed in one side of the ring 1 so as to chamber 6 formed between the rings 1- and 2, ashereinbefore explained. The cooling medium used in the cooling chamber 6 may or some other liquid, as may be found most convenient under the circumstances met with in practice.

When using air as a cooling medium, it has been found expedient to connect the outlet port' 2Qw-ith the inlet port 23 which conmeets with the compression chamber, so that the air taken into the compression chamber is first drawn through the cooling chamber 6, thus facilitating the cooling of said pump. A suitable conduit 30 made up of the usual pipe fittings may be used for connccting these ports, as illustrated in Fig. 1.

T he operation of the device shown is as follows A pulley or other driving means (not shown) is attached to the shaft 15 and connected with a source of power. The rotor, being rigid on the shaft 15,-and the disk member 17, which is connected to the rotor through the medium of the vanes 14,-are caused to rotate about their respective axes. These axes being eccentric, the vanes 14 are caused to move back and forth' in their respective slots in the rotor- 12 and are held in firm contact with the annular wall 9 as they are moved through the compression chamber 13. As'the vanes move through the compression chamber 13, fluid is drawn in through the inlet port 23 into the space at-the .rear of each of the vanes, and as the vanes approach the opposite end of the compression chamber, it is compressed and discharged through the outlet port 24. Thus, as the pump is caused to rotate, it supplies to the desired point a substantially continuous compressed supply of the fluid.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of'this invention as defined by the following claims.

I claim: i 1. In a, device of the class described, the combination of a casing having an annular cooling chamber formed therein and extending almost entirely therearound, inlet rate inner and outer rings concentrically arranged one within the. other in air-tight contact, said casing having an annular cool-f ing chamber formed therein between the opposed-faces and extending almost entirely around said inner and outer rings, inlet and outlet ports connecting with the opposite ends ofsaid cooling chamber, said inner ring having an oval-shaped. bore, a rotor journaled in said casing whereby the periphery of said rotor fits with a part of the wallofsaid bore and provides a space between the periphery of said rotor and another part of the wall of said bore adapted to serve as a Compression chamber, a, lurality of radially movable vanes carrie by said rotor, means for urging said vanes into contact with said other part of the wall of said bore as said vanes are caused to traverse said compression chamber, inlet and outlet ports formed in said casing and connecting with the opposite ends of said com- 10 pression chamber, and a conduit connecting the outlet port of said cooling chamber with the inlet port leading to said compression chamber.

Signed at Chicago this 30th cember, 1916.

GUSTAF oLsoN.

day of De- 15 

